INDEX TO VOLUME 19
Leading articles are in bold face type; notes, abstracts and re- views are in ordinary type. only minerals for which definite data are given are indexed.
Alderman,A. R.. 90 Banding in fissure veins, cause Alexander, A. E. Dust fall of of. (Shaub) 393 November13, 1933. . . 230 Bannister, F. A. 233, 389,390 - Recentdevelopments in Barrett, R. L. ComParison of high index resins . . 385 ultra-violet sourcesforPro- 132 ducing fluorescencein min- Allanite from Wyoming. (Anal- erals. . 578 ysis) (Wells) 81 Barth, T. F. W. and Balk' R. Allophanite. Optical data. 503 Chloritoid from Dutchess Alumo-chalcosiderite.(Jahn) 36 Co.,N. Y.... 345 Amarillite (Ungemach).. . 287 Donnay, J. D. H., and 'Warren, Amberg, C. R. and Tunell. G. Various modes B. E. X-ray study of nar- of attack in crystallograPhic sarsukite. . . 546 investigations. . 437 Aminoff, G.. 287 t29 Andersen,O. and Sosman,R. B. Baryte crystalsfrom Yorkshire. Composition-tem perature (Russell).. . 284 phaseequilibrium diagrams Beacon sandstone of South Vic- of the refractory oxides. toria Land, PetrograPhY of (Review) 488 (Stewart) ..t32,35I Anderson. G. H. Pseudo-cata- Beavan, A. P. and flawleY, clastic texture of replace- J. E, Mineralogy and gene- sis of the MaYville iron ore rnent origin in igneous 'Wisconsin. rocks .. .. 185 of 13I,493 309 Antarctic rocks, petrography of. Becquerelite..... at (Stewart). . . 150 Belknap, R. L. Hematite Cape York, Greenland. 433 Anthraxolite. nickelif erous and Berthierite from Romania. uraniferous, from Port Ar- (Zsivny, Zombory) 390 thur, Ontario. (Ellsworth). 426 Beryl, from Mt. Topaz, Utah. Asbestos, unusual occurrence Opticaldata... 14 of. (Analysis) (Wahlstrom) 178 Beryl-molybdenite deposit of igneous and Association of Chaffee Co., Colorado. sedimentaryamphibolites. (Landes).... . 131 (Runner) tJz Beryllium minerals,euclase and phenakite, from Africa. Baccaredda,M. . . 35 (Spencer).. 390 Balk, R. and Barth, T. F. W. Biaxial crystal model. (Rogers) 206 Chloritoid from Dutchess Bixbyite and associatedminer- Co.,N. Y. 345 als in Thomas Range, Ball, C. G. 134 Utah. (MontgomerY).... 82 609 610 THE AMERICAN MINERALOGIST
Blow-me-down intrusive com- Cassiterite, unusual crystal plex, Bay of Islands, New- habit of. (Gruner). . . . 552 foundland. (Snelgrove, Castanite, Barker's determini- Roebling, Kemmerer) 2l tive angles for. (Donnay). . 553 Borgstrom's high index liquids, Century of Progress in crystal- caution against use with lography. (Whitlock). . .. 93 leadglass prisms. 181 Ceruleolactite.Opticaldata... 500 Borickite.Optical data...... 500 Chlorite. Optical data. . . . . 503 Born, K. E. Fibrous pyrite from Chlorite (rapidolite) 339 the lead-zinc district of Chloritoid from Dutchess Co.. Illinois...... 385 N. Y. (Barth,Balk)...... 345 Boswell, P. G. H. Mineralogy Claudetite.(Palache)...... 128,194 of sedimentary rocks. Claussen, G, E, Spectroscopic IBook review] 3+ analysis of galena, sphaler- Bowen,N. L... 131 ite, and pyrite. . 221 Brammall,A...... 233 Clayton, P. A.. . . 90 Brendler,W. Sodalite from Bo- Coalcomposition.(Fisher)... 133 livia.(Analyses).... 28 Collophanite.Optical data. . 499 Broughton, M. N. Secondary Colony, R. J. and Howard, selenite crystals in Ter- A. D. Observations on tiary strata in Texas.. . . . 466 spherulites. 515 Buerger,M. J Fluid inclusions Composition-temperaturephase in pyrite. ... 605 equilibrium diagrams of Lattice indices and the refractory oxides.(Sos- transformations in the gno- man, Andersen) [Review]. 488 monicprojection...... 360 Cook, C. W. Memorial of. Pyrite-marcasite rela- (Ilunt). It4 tion. . . JI 'W. Copper, crystallized, from Buerger, N. Unmixing of Franklin, N. J. (Hatr). . . . 480 chalcopyrite from sphaler- Copper, determination of small ite.. .. 525 amounts in rock. (Groves). 390 and Buerger, M. J. Cordierite in Dartmoor granite. Crystallographic relations (Rao,Brammall)...... 233 between cubanite segrega- Cristobalite.Optical data..... 504 tion plates, chalcopyrite Crystallographiccomputations, matrix, and chalcopyrite improved method of . (Hey) 285 twins.. 289 Crystallographic investigations, Buttgenbach,H...... 236 various modes of attack in. (Donnay,Tunell, Barth).129,437 Calcite crystal from Godfrey, Crystallographic relations be- Ontario,unusual. (Parsons). . 128 tween cubanite segregation Calkins, F. C. Transfer of plates, chalcopyrite matrix, grains from one liquid to and chalcopyrite twins. another 143 @uerger,Buerger) ...... 289 Cameron, E. N. The synthetic Cuprosklodowskite.(Vaes).... 235 resin hyrax. J/J Curite . 314 Campbell,C. D. Book review.. 388 Currier, L. W. Staurolite and Carobbi,G...... 555 associated minerals from 6t1 JOURNAL MINERALOGICAL SOCIETY OF AMERICA
de- schistat Gassetts,Vermont 335 Emmons, R. C. Plagioclase motli- Curti, R.. 556 termination bY the fied universalstage' - . .129,237 r29 Dahllite. Optical data. . 499 of. Dendrites, two dimensional, Enargite, pseudo-sYmmetrY 279 and their origin. (Swartz- (West). 500 Iow)... 131'403 Evansite.Optical data'...... Determinants apPliedto crystal- Face-adjustment in two-circle lography, theorY of' (Don- goniometrY.(HeY).'. ".' 285 nay)... . . 593 Face and zonesYmbols relerred grains and crushed Detrital to hexagonalaxes' (HeY). . 285 rock fragments,methods of Faust, G. T. Book review . . . ' 433 handling, and determina- Ferrari,A...... 556 tion of. (Partridge)'. ' . . 482 Ferruccite.(Carobbi) ..... ' 555 Differentiation in Teschenite Fiedlerite.(Palache) .'.... .' 389 sills at El Mulato, Mexico. Fisher,D. J.....' 133 (Watson) 134 Fisher, L. W. GraPhite in Peg- 556 Dittler,E..... matite. 169 T, A' Determination of Dodge, Growth of stalactites. 131 , 429 optic angle with universal 131 stage.. .. .' 62't29 Fisk,H. N.. . . . 131 Donnay, D. H. Barker's de- J. Flow-structures, measurement terminative angleslor cas- of. (Pabst). 137 tanite.... 553 Foshag, W. F. Searlesite from Memorial of G. Friedel 329 EsmeraldaCo., Nevada. .. 268 Theory of determinants Fourmarierite...... """ 313 applied to crystallograPhY. 593 Friedel, G., memorial of. (Don- Book review 83 nay)...... 329 Tunell, G', and Barth' Frondel, C. Selective incrusta- T. F. W. Various modes of tion of crYstalforms...... 316 attack in crYstallograPhic investigations. . . . .129,437 Garnetinmuscovite..- '.-'. 79 86 Dravert,P.L...... 89 Garnet-toPazePigrowth. . . .. Dryden, L.. I32 Geology and ore dePosits of Dust fall of November 13, 1933. Sierra Co., N. Mexico. (Alexander). . 230 (Harley) [Bookreview]. '. 555 Glass, J. J. Standardizationof 459 Elements of OPtical Mineral- index liquids. ogy, Pt. II. DescriPtionof Glaucocerinite.(Dittler, Koech- minerals. Third edition. lin). 5s6 (Winchell) [Book review]. . 33 Gold-bearing stonY meteorite Ellsworth. II. V. and Osborne, from Melrose, N. Mexico. F. F. Uraninite from Lac (Nininger). 370 Pied des Monts, SaguenaY Goldschmidt, Victor, memorial 106 district,Quebec... 42L of. (Palache). - Nickeliferous and uran- Goldschmidt,V. (Himmei and iferous anthraxolite from Miiller) Kursus der Kris- PortArthur, Ontario. . ... 426 tallometrie. [Book review]. 487 612 TEE AMERICAN MINERALOGIST
Gonyer, tr'. A. and Moehlman. High-index refractometer.(Em- R. S. Monticellite from mons,Williams).... 129 Crestmore, AJA Calif. High index resins,recent devel- 130 opments in. (Alexander) 385 Gordon, S. C. Book review 487 Hodge, H. C. and McKay, If. Graebite. (Treibs, J. Steinmetz). 491 "Microhardnesstt of min- Graphite in pegmatite. (trisher) 169 erals in Mohs scale t6l Croves,A. W... 390 Hornblende in igneous rocks, Gruner, J. W. Memori"i oi conditions for crystalliza- Friedrich Rinne. . t12 tion of. (Kennedy) 284 Strucfures of vermicu_ Howard, A. D. and Colony, R. J. lites and their collapse by Observations on spheru- dehydration. s57 lites.. . 515 Unusual crystal habit of Hubbard, L. L., memorial of. cassiteri te 552 (Lane). 118 129 Hunt,'W. F. Memorial of C. W'. Cook...... 114 Haff, J. C. Crystallized native Book review s55 copperfromFranklin, N. T. 490 Hurlburt, C. S., Jr.. 130 Hall, G. M. Zoisite and other Hydroromeite. (Natta, Bacca- minerals included in mica redda). from Spruce pine, JJ N. Caro_ Hyrax, the synthetic resin lina...... Z6 (Cameron) J/J Halloysite. Optical Data 4g7 Harley, G. T. Geology and ore Ianthinite ... . 313 deposits of Sierra Co., N. Index liquids, standardization Mexico. [Book review]. 555 of. (Glass) Harmotone, 4Sg new localities in fndium, crystal form. (palache) BritishIsles. (Russell).... 90 . .128,205 Hassell, O. Kristallchemie. Iron-silicide, fictitious occur- [Book review] $3 renceof. (Spencer) .. .. 90 Hawley, J. E. and Beavan. A. P. Mineralogy and gen_ Jahn,A. 36 esis of the 'W, Mayville iron Jenks, tr'. I{eavy minerals ore of Wisconsin...... 131,493 in syenites of pleasant Mt., Heavy minerals from continen- Maine...... 476 tal shelf off N. E. United States.(Alexander)...... l3Z KrO-AlrO3-SiO2 system. (Schair- Heavy minerals in the syenites er, Bowen).. .. l3l of Pleasant Mt., Maine. Kaolinite in Illinois (Ball) (Jenks) coal. 134 416 Keller, W. D. Mounting me- Heavy minerals in the Tertiarv dium of 1.66index. . 394 intrusives of central Colo_ Kemmerer, L., Snel- rado. (Stark). J. Jr., 5g6 grove,A. K., and Roebling, Heliumspectrometer lamp.... 465 III, F. W. Blow-me-down Hematire at Cape york, ireen_ intrusive complex, New- land.(Belknap)...... 433 foundland. ... 2l Hey,M.H...... 233,28s.3g1 Kennedy, W. Q.. 284 613 JOURNAL MINERALOGICAL SOCIETV OF AMERICA
Kerr, P. F...... 285 Linnaeite grouP of sulPhides. 130 and Rogers,A. F. Thin- (Tarr) 34 section mineralogY. [Book Lonsdale,J. T. Book review... reviewl 232 Lusakite, a Co-bearingsilicate (Skerl, Koechlin,R. 556 from N. Rhodesia. 390 Kolbeckite. (Thurnwald, Pich- Bannister).. ler) 36 Koninckite. Optical data 500 Marcasite-pyrite relation. @uer- Kraus, E. H. Memorial of F. R. ger) 37 van florn 101 Matlockite, structure and oPti- Kristallchemie. (Hassell)[Book cal proPerties'(Bannister) ' 389 reviewl ... 433 Matlockite. 287 Ksanda,C. J. 130 Mayo, E. B. and O'LearY,W' J' Kupletski, B. M. PetrograPhY Oligonite, a manganosider- of Kola Peninsula. [Book ite from Leadville, Colo- review] 388 rado.'. 304 Kursus der Kristallometrie. Mayville iron ore of W-isconsin' (Goldschmidt, Himmel, mineralogY a:rd genesis of' Miiller) [Book review]. . . 487 (IIawleY, Beavan) . l3l'493 McCormick, R' B. Paragonite Landes,K. K...... 131 from Pizzo Forno, Ticino, Lane, A. C. Memorial of L. L. Switzerland 134,+31 118 Hubbard.. McKay, J. II. and l{odge, H' C' -Five-foltl check of uran- ttMicrohardnesstt of min- initeage?..... 1 erals of Mohs scale 16l (Ungemach) 287 Lapparentite. Metavariscite.OPtical Data 499 S. Book reviews. 33,232 Larsen,E. Meteoric stonefrom New South transforma- Lattice indices and Wales. (SPencer) 390 tions in the gnomonic Pro- ttMicrohardnesstt of minerals jection. (Buerger).. .. 360 of Mohs scale. (Hodge' parameters' graPhical Lattice McKay)... 161 method for determination Minasragrite.(Palache)'128,197 of. (Terpstra, van Weer- Mineralogical SocietYof Amer- tlen)...... 531 lca Laudermilk, J. D. and Woo
Moehlman, R. S. and Gonyer, Objective with variable dia- tr'. A. Monticellite from phragm.(Slawson)...... 24 Crestrnore,Calif...... 474 Octahedrite as an alteration Molybdenum occurrence and product oftitanite. (pough) 599 tests...... zls Otleary, W. J. and Mayo, E. B, Monochromatic light source. Oligonite, a manganosider- (Helium). 464 ite from Leadville, Colo_ Montgomery, A. Recent find of rado...... 304 bixbyite and associated Oligonite, a manganosiderite minerals in Thomas Range, from Colorado. (Mayo, Utah...... 82 O'Leary).... J04 Monticellite from Crestmore. Optic angle, determination with Calif. (Moehlman, - Gonyer) 474 universal stage. (Dodge).. Montmorillonite, 62 secondary, in Orientation of crystallitesin ig- a California pegmatite. nition productsof Mg(OH)r (Laudermilk,W'oodford) 260 and Ca(OH):.(West). 281 Montroydite,new occurrencein Osborne, F. F. and Ellsworth, California. (Woodhouse). . 603 H. V. Uraninite from Sa_ Mottramite or psittacinite. guenay district, euebec. . 421 (Schaller) 180 Mounting medium of 1.66 in- Pabst, A. Measurement of flow- dex.(Keller)... 384 structures.... t37 Muscovite. (Analysis and op- Palache, C. Claudetite, minas- ticaldata) ...... 338 ragrite, samsonite, native seletrium,indium. . ..12g,194 Narsarsukite, X-ray study of. Crystallography of ura_ (Warren,Amberg)...... 546 niumoxides...... 129,309 Native selenium.(palache). .128.203 Memorial of Victor Natta, G.. 35 Goldschmidt. 106 Nelson Co., Virginia, minerals Minerals from Topaz and mineral relations of. Mt.,Utah.... .14,130 (Ross)...... 234 Pseudobrookite...... 16, l2g Neotocite.Optical data... 500 389 Newark Mineralogical Society.32, 91 Paracoquimbite.(Ungemach). . 2g7 New Haven MineralCIub. .g2,2g6 Paragonite from Pizzo Forno. Newhouse, W. H. Sourceof V. Switzerland.(McCormick) Mo, W, and Cr in oxidized ..134,431 lead deposits 20g Paralaurionite.(Palache) .... . 3g9 New mineralnames.... Parsons,A. L. Projection sheets . . .35,235, 287 ,491,555 for gnomonic and stereo- New York Mineralogical CIub. graphicprojections...... 340 . .234, 343,391,434. 488 128 Nieuwenkamp,W...... 2gT Partridge, F. C. Methods oi Nininger, II. H. Gold-bearing handling and determina- stony meteorite from Mel_ tion of detrital grains and rose,N. Mexico...... 370 crushed rock fragments . . 482 Northupite.Optical data..... SO2 Partschinite. 288 JO\]RNAL MINERALOGICAL SOCIETY OF AMERICA 615
Petrographyof the Kola Penin- of. (Terpstra, van Weer- sula. (Kupletski) [Book re- den)... 531 viewl . . 388 Rinne, Friedrich, memorial of. Phemister,J...... 233 (Gruner). lt2 Philadelphia Mineralogical So- Roberts, J. K. Virginia stauro- ciety.. .. 31,183,234,285,344 litesas gems. . 549 Phillips,F. Coles. . .90, 91 Rocksaw. (Vanderwilt)...... 224 'W., Phosphates, new group of. Roebling,III, F. Snelgrove, (Hurlburt,Gonyer)...... 130 A.K., and Kemmerer, J. L., Phosphosiderite.Optical data.. 499 Jr., Blowrme-down intru- Pichler,A. A. Benedetti.. ... 36 sive complex, Bay of Is- Plagioclase determination by lands, Newfoundland .. . . 2l modified universal stage. Rogers,A. F. Model for biaxial (Emmons). ....129,237 crystals. 206 Point symmetry groups, logical 128 symbolsfor.(Soller). .... 412 - and Kerr, P. F. Thin- Portlandite. (Tilley) 35 section mineralogY. [Book Pough, F. H. Octahedrite as an reviewl 232 alteration product of ti- Ross,C. S... 234 tanite.. . . 599 Royal Ontario Museum of Min- Progressive metasomatism in eralogy. (Walker) 127 flint nodules of Scawt Hill Runner,j.J.... 132 contact zone. (Tilley, A1- Russell,A. ....90'284 derman)...... 90 Projectionsheets for gnomonic Saleite.(Thoreau, Vaes)...... 36 and stereographic projec- Samsonite.(Palache)...... 128,200 tions.(Parsons) ...... 128,340 Schairer,J. F. .. 131 Pseudobrookite.(Palache) . . .16, 128 Schaller, W. T. Mottramite or Pseudobrookite...... 15 psittacinite 180 of Pseudo-cataclastic texture Schoepite...... 309 replacementorigin in igne- Searlesite from Esmeralda Co., ousrocks.(Anderson).... 185 Nevada. (Foshag). 268 Psittacinite or mottramite. Selective incrustation of crystal (Schaller) 180 forms.(Frondel). .. 316 Pyrite, fibrous, from lead-zinc Selenium, native, crYstal form district of Illinois. (Born). 385 of. (Palache). .128,203 Pyrite, fluid inclusions in. in (Buerger).... 605 Selenite crystals, secondarY, in Texas. Pyrite-marcasiterelation. (Buer- Tertiary strata 466 ger)... 37 @roughton). Shaub,B. M, Causeof banding Rao, B. Ramo.. 233 infissureveins... " " " 393 Read,H.H...... 233 Shower of meteoric stones in Reflectivities of sulfide ore- West Siberia, MaY 26, minerals.(Phillips). 90 1932.(Dravert)...... 89 Reticular densities and lat- Significance of three genera- tice parameters, graphical tions of plagioclasein an methods for determination andesite-basaltflow. (Fisk) 131 616 THE AMERICAN ],|INERALOGIST
Silica-glassfrom Libyan Desert. Staurolitesas gems 549 (Clayton,Spencer)... 90 Steinmetz,H..... 491 Silicatesheet structures. (Grun- Stevensite.Optical data. . . . . 503 er). . . 129 Stewart, D., Jr., Petrography of Skerl,A. C. 390 Antarcticrocks...... 150 Slawson, C. B. Objective with Petrography of Beacon variablediaphragm ..... 24 sandstone of South Vic- Sussexitefrom fron Co., toria Land. 132,35I Michigan...... 130,575 Sussexite from Iron Co., Michi- Snelgrove,A. K., Roebling, III, gan.(Slawson)...... 130,575 F. W., and Kemmerer, Jr., Swartzlow, C. R. Two dimen- J. L. Blow-me-down intru- sional dendrites and tleir sive complex, Newfound- origin 131,403 land 2l Swedenborgite.(Aminoff) .... 287 Sodalite from Bolivia. (Analy- Sylvanite, x-ray goniometer sis)(Brendler).... reflectiongoniometer meas- Sodium molybdo-tellurate, crys- urements on. (Tunell, tallographic orientation of. Ksanda) 130 (Terpstra,van Weerden). 'W. . 275 Soller, Logical symbols for Tarr,W. A.... . 130 point symmetry groups. . . 412 Terpstra, P. and van Weerden, 'W. Sosman, R. B. and Andersen, J. Crystallographic ori- O. Composition-tempera- entation of sodium molyb- ture phaseequilibrium dia- do-tellurate. 275 grams of the refractory Graphical methods for oxides. .... 488 determination of reticular [Review]'W, Source of V, Mo, and Cr densities and lattice pa- in oxidized lead deposits. rameters. 531 (Newhouse). 209 Leerboek der Geomet- Specific gravities of sulphides rische Kristallographie. and allied ore minerals. [Book review] 88 (Phillips) 91 Thin-section mineralogy. (Rog- Spectroscopic analysis of ga- ers, Kerr) [Book review] 232 lena, sphalerite and pyrite. Thoreau,J...... 36,235 (Claussen) 221 Thoreaulite.(Buttgenbach).. 236 Spencer,L. J. . . .90,390 Thurnwald, H. 36 Spherulites, observations on. Tilley,C.E...... 35,90 (Colony,Howard) 515 Topaz-garnetepigrowth ..... 86 Stalactites, growth of. (Fisher) Topaz, Mt., Utah, minerals .. 131,429 from.(Palache)...... 14 Stark, J. T. Ifeavy minerals in Tourmaline (dravite) (optical the Tertiary intrusives of data). . 339 central Colorado 586 Transfer of grains from one liq- Statistical correlationof hear,1,, uid to another. (Calkins) . 143 mineralsuites. (Dryden). 132 Treibs,A...... 491 Staurolite and associatedmin- Tridymite.Optical data...... 504 erals from schist at Gas- Tunell, G., Donnay, J. D. II., sets,Vermont (Currier).. . 335 and Barth, T. tr'. W'. Vari- JOURNAL MINERALOGICAL SOCIETY OF AMERICA 617
ous modes of attack in Walker,T.L...... 127 crystallographic investiga- Wapplerite. Optical data 503 tions. .. .. 437 Warren, B. E. and Amberg, 1?O 1?n C. R. X-ray study of nar- Tungsten deposits, Mill City, sarsukite 540 Nevada. (Kerr) 285 Watson, E. H. t34 Two-dimensionaldendrites and Wells, R. C. Allanite from Wy- their origin. (Swartzlow) 131 omlng .. 81 West, C. D. Orientat ion of crys- violet produc- Ultra sources for tallites in the ignition prod- ing in miner- fluorescence ucts of Mg(OH): and als, comparison (Bar- of. Ca(OH)2. .. 281 rett) 578 Pseudosymmetry of en- Ungemach,H. 287 arglte 279 'Whitlock, Unmixing of chalcopyrite from H. P. Century of (Buerger). sphalerite. 525 Progress in crystallogra- Uraninite age, five fold check? phy... 93 (Lane)...... I Williams, E. F. 129 Uraninite from Saguenay dis- Winchell, A. N. Elements of (Ellsworth, trict, Quebec, Optical Mineralogy. Part Osborne)... 421 II. Descriptionof minerals. Uranium oxides, crystallogra- Third edition. [Book re- phy (Palache). of. . 128,309 viewl.. 33 Uranolepidite.(Thoreau) - z3J Woodford, A. O. and Lauder- D. Secondary Vaes,J. F. 36 milk, J. montmorillonite in Cali- Vaes,J. P. 235 a Vanadium,tests for. 2tl fornia pegmatite 2(0 Vanderwilt,J. W.A rock saw ,14 Woodhouse, C. D. New occur- Van Ilorn, F. R., memorial of. rence of montroydite in (Kraus) 101 California.. 603 van'Weerden,W. J. and Terp- Wulfenite at Brandy Gill, Cum- stra, P. Crystallographic berland. (Russell) 90 orientation of sodium mo- Iybdo-tellurate. 275 X-ray goniometer and reflec- Graphical methods for tion goniometer measure- determining reticular den- ments on sylvanite. (Tu- sities and lattice param- nell, Ksanda) 130
eters J.' I Variscite.Optical data 499 Zamboninite. (Discredited spe- Verrniculites, structures of, and cies) (Ferrai, Curti) 556 their collapse by dehydra- ZedTitz,O.. 288 tion. (Gruner) 557 Zeolite studies. VII. Clinoptilo- Virginia staurolites as gems. lite. (Hey, Bannister). . . 233 (Roberts).. 549 VIII. Vapor pressure. Voelckerite.OpticaI data 500 (Hev) 391 Zoisite and other minerals in- Wahlstrom, E. E. Unusual oc- cluded in mica from Spruce currence of asbestos 178 Pine, N. Carolina. (Ilall).. 76 618 TEE AMERICAN MINERALOGIST
Zombory,L...... 390 Zonesas basisof crystalsys- Zoned associationsof antigo- tems.(Rogers)...... 128 rite,talc,actinolite,chlorite Zoninginplagioclasefeldspar. and biotite in Unst, Shet- (Phemister) 233 landlslands.(Read)... 233 Zsivny,V...... 390